Only the original author should work with approval.
I'm pretty sure they don't do it for every scene. For a lot of scenes where there's no direct dialogue from that specific character, sometimes whoever's writing that scene seems to use very basic barometers like "evil character approves" "good character disapproves" or even "ALL characters approve" even if it doesn't make sense for all of them.
I have a hard time believing Minthara approves of helping Yenna, feeding her or giving her money, and that her writer, Adam Smith, would agree with that approval. It's why I don't take the approval system too seriously, by Act 3 it becomes quite basic and surface-level in the way it works.
